The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform

A. Oudin - One of the best experts on this subject based on the ideXlab platform.

  • Thermal fatigue analysis of automotive Diesel piston: Experimental procedure and numerical protocol
    International Journal of Fatigue, 2015
    Co-Authors: F. Szmytka, Mehdi Salem, Farhad Rezai-aria, A. Oudin
    Abstract:

    A new thermal fatigue rig using High Frequency induction heating is developed to test automotive Diesel Engine Pistons. An adapted test piston is internally cooled by permanent water flow while its bowl sensitive to thermo-mechanical fatigue is subjected to cyclic induction heating. The temperature is measured in depth by thermocouples and in surface by a thermal infrared camera or a pyrometer. The crack initiation and propagation and the local deformations are provided by optical means. Thermo-mechanical loadings are calibrated by thermal measurements on the piston during Engine operation and the entire test is modelled by finite elements. A constitutive model and a fatigue criterion for aluminium alloys are proposed to estimate the piston lifetime under severe cyclic loading. The proposed fatigue bench allows loading the piston in thermal fatigue scheme very similar to that encountered in Engine operation conditions. Crack detection is facilitated by numerical modelling that helps to detect the most critical areas and also to reliably estimate the number of cycles for initiate cracks.

F. Szmytka - One of the best experts on this subject based on the ideXlab platform.

  • Thermal fatigue analysis of automotive Diesel piston: Experimental procedure and numerical protocol
    International Journal of Fatigue, 2015
    Co-Authors: F. Szmytka, Mehdi Salem, Farhad Rezai-aria, A. Oudin
    Abstract:

    A new thermal fatigue rig using High Frequency induction heating is developed to test automotive Diesel Engine Pistons. An adapted test piston is internally cooled by permanent water flow while its bowl sensitive to thermo-mechanical fatigue is subjected to cyclic induction heating. The temperature is measured in depth by thermocouples and in surface by a thermal infrared camera or a pyrometer. The crack initiation and propagation and the local deformations are provided by optical means. Thermo-mechanical loadings are calibrated by thermal measurements on the piston during Engine operation and the entire test is modelled by finite elements. A constitutive model and a fatigue criterion for aluminium alloys are proposed to estimate the piston lifetime under severe cyclic loading. The proposed fatigue bench allows loading the piston in thermal fatigue scheme very similar to that encountered in Engine operation conditions. Crack detection is facilitated by numerical modelling that helps to detect the most critical areas and also to reliably estimate the number of cycles for initiate cracks.

T. Suresh Prakash - One of the best experts on this subject based on the ideXlab platform.

Mustafa Ozcanli - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of fuel consumption and vibration characteristic of a compression ignition Engine fuelled with high viscosity biodiesel and hydrogen addition
    International Journal of Hydrogen Energy, 2017
    Co-Authors: Kerimcan Çelebi, Erinç Uludamar, Mustafa Ozcanli
    Abstract:

    Abstract Viscosity property of a fuel is a crucial point for internal combustion Engine characteristics. Performance and emission parameters as well as injector's life of an Engine is primarily effected by viscosity of the fuels. In present study, effect of high viscosity biodiesel fuels with hydrogen addition was investigated in a compression ignition Engine. Biodiesels that are produced from Pongamia Pinnata and Tung oils were used as pure biodiesels as well as blended with low sulphur diesel fuel at the volume ratios of 50% and 75%. Furthermore, hydrogen gas was injected into intake manifold in order to evaluate its effect with the usage of high viscous liquid fuels. The results revealed that brake specific fuel consumption was increased with biodiesel fuels, whereas hydrogen addition into intake manifold improved the consumption. Total vibration acceleration of the Engine reduced with biodiesel and hydrogen additions. Frequency spectrum indicated that this decrement was primarily lowered due to less energy transmitted through Engine Pistons that converted from chemical energy of fuels.

Mehdi Salem - One of the best experts on this subject based on the ideXlab platform.

  • Thermal fatigue analysis of automotive Diesel piston: Experimental procedure and numerical protocol
    International Journal of Fatigue, 2015
    Co-Authors: F. Szmytka, Mehdi Salem, Farhad Rezai-aria, A. Oudin
    Abstract:

    A new thermal fatigue rig using High Frequency induction heating is developed to test automotive Diesel Engine Pistons. An adapted test piston is internally cooled by permanent water flow while its bowl sensitive to thermo-mechanical fatigue is subjected to cyclic induction heating. The temperature is measured in depth by thermocouples and in surface by a thermal infrared camera or a pyrometer. The crack initiation and propagation and the local deformations are provided by optical means. Thermo-mechanical loadings are calibrated by thermal measurements on the piston during Engine operation and the entire test is modelled by finite elements. A constitutive model and a fatigue criterion for aluminium alloys are proposed to estimate the piston lifetime under severe cyclic loading. The proposed fatigue bench allows loading the piston in thermal fatigue scheme very similar to that encountered in Engine operation conditions. Crack detection is facilitated by numerical modelling that helps to detect the most critical areas and also to reliably estimate the number of cycles for initiate cracks.